The data maintenance method of script history is different for DataSpider Servista 2.1.1 and DataSpider Servista 2.3.x onwards.
With the above mentioned causes, when confirming the updated date/time that has been saved in 2.1.2, the date displayed in restored script is "1970/01/01".
Also, the above mentioned will impact only the script. You can also refer to the one created/updated in 2.1.1 for project update date/time